[docs] [issue31327] bug in dateutil\tz\tz.py

[Cheryl Sabella]

Change by Cheryl Sabella <cheryl.sabella at gmail.com>:


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stage:  -> needs patch
versions: +Python 3.7, Python 3.8 -Python 3.6

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31327>
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